Composite shipping case



l I l e I www@ n Jan. 14, 1930.` P F, BQEY 1,743,703

COMPOSITE SHIPPING CASE Filed July 5, 1926 Patented Jan. 14, q

UNITEosTATl-:s PATENT ori-'Icalnur. r. 30mm, or sT. raul.; VMINNESOTA, AssrGNon To wALnoRr Puna PRODUCTS p comrm, A CORPORATION or MINNESOTA oourosITE smrrINe casa Application led July 6, 1926. Serial No. 180,692.

This invention relates 'to shipping cases, certain of the exterior walls of which, are constructed of corrugated board and others of solid ber board.

It is my object to minimize the cost and weight of shipping cases, and at the same time to retain ample strength by constructing the normally weaker walls from solid ber board, amd the other exterior Walls from corrugated board, the seams joining the walls being formed entirely from solid portions of the board.

More particularly, it is myY object to form on the corrugated walls of such cases integral fianges or margins of solid and relatively toughv board, adapted to beV secured by wire stitching to other solid ber portions of the cases.

Heretofore, shippin cases have been formed with certain oft e exterior walls constructed of solid fiber board and certain others of corrugated board, but it has been considered necessary either to secure the several walls together by adhesive or to insert wire stitches through the corrugated board yinto the ber board and to clinch the stitches on the side of each seam which is formed from solid ber board. However, Vas corrugated board is frequently constructed from sheets which are equally as tough and durable as the sheets from which solid ber board is constructed, it will be evident that the apparent weakness of the corrugated board is due to its compressible nature, caused by the hollow spaces between corrugations in the core. Thus, corrugatedboard is unsuited to receive wire stitches in a seam of a box, be-

cause the stitches tend to tear through the,

several layers of such boardsuccessively at the point where the stitches cross the surface of the board. I have discovered that the difficulty of stitching corrugated portions of a box to other portions may be overcome by treatment of the margins of flanges incorporated in the seams in sucha manner that the board is reduced to solid ber at the points of attachment. In my improved box, the wire stitches maybe driven through and clinched upon a surface of' either the ber bbard panel or upon the solid margins of the corrugated board, and the application of the invention is not limited' to boxes in which solid ber walls are accessible for engagement with the clinching head of a stitching machine.

With these objects in view, my invention will be best understood by reference to the accompanying drawings, in which Figure 1 is a perspectlve view ofmyimproved box with the cover closed and one of the corners cut off to show the construction of one of the end seams; Fig. 2 is a section taken on the line 2-2 of Fig. 1 with the cover of the box partially open ;V Fig. 3 is a fragmentary sec-` tion taken on the line 3-3 of Fig. 1 with the cover open; Fig. 4 is a fra entary plan view of the component blanksggf sheet material laid fiat and Fig. 5 is an enlarged fragmentary section through a corner of the box showing the solid bre ange on the corrugated blank overlapping an end blank.

My improved shipping case is formed from a main body blank,'which is creased along lines 5, parallel to the corrugations, to form longitudinal` corners of the box. The creases thus divide the main corrugated blank into a bottom, two longitudinal sides 7 and two cover flaps 8. At each end of the several walls 6, 7 and 8, a seriesfof anges 9, 10 and 11 are formed by creasing transverse the creases 5 and by cutting slots of the required depth between the several ianges. Two similar ends 12' of the box are formed from solid fiber blanks, each having an integral cover panel 13 and a base ange 14 produced by crease lines 15.

The end flanges 9, 10 and 11 of the corrugated sheets are rendered tough and solid by treatment during the manufacture of the board.- This treatment consists in rolling flat bands of the desired width in the corrugated core before said core is attached to the surface sheets of the board, and in applying adhesiveto theinner sides of the Surface sheets, and then pressin the portions of the surface sheets with a esive thereon upon Vthe flattened core, pressure being applied to the solid portions of board thus produced until the adhesive has set and a tough,

quently, the sheet having solid ber portions i is so cut that the solid fiber portions are along the margins forming the flanges 9, 1() and 11.

5 In the manufact-ure of the boxes, the base flanges 14 on the solid ber ends 12 arefastenedby wire stitches 17 upon the outer surface of the bottom panel 6 at each end. Thus, the blank cases are shipped flat t-o be finally assembled by the packer of the goods before the cases are filled. To extend vthe blanks in box form, the ends 12 are folded to their position perpendicular to the bottom 6, and the flanges *10 are then folded in to engagement with the outer surfaces of the ends 12'. Now the flanges 10 are secured by wire stitches 16 driven through said flanges into the margins of the ends 12, and the flanges 9, which extend on the inner surfaces l0 of the ends 12, are secured in place by driving wire stitches 18 from the outside of the f box through the end panel 12 and clinchi'ng said stitches upon the inner surfaces of the flanges 9. The boxes, thus completed, are

ready to be filled, and after the goods to be shipped have been placed therein, the coverV flaps 8 are rst folded'in upon the top of the goods Withthe flanges 11 extending downward, adjacent t'o the inner surfaces of the ends 12. Finally, the" cover aps 13 are folded upon the outer surfaces of the flaps 8 and are, preferably, secured4 in placev by adhesive. A f l It willbe noted that in the construction of my improved case the wire stitches 17 merely hold vthe base flanges. 14 in'place and are not depended upon to give strength to the joints between thel corrugated bottom and solid ber ends. Thestitches 18 engaging strength at 'the basev corners ofthe end. It

will further be noted' thatin assembling the l the solid ber flaps 9 give the box ample marginal portions of said corrugated blank,

secured together by wire stitches.

2. In a composite shipping case, having a plurality of walls constructed from separate blanks, at least one of said walls being constructed from corrugated board having liner and ycorrugated members secured togetherI land-another wall of the case being formed from solid ber board, a relatively tough and solid flange formed integral with said corrugated wall and adapted to be folded into en` gagement with said solid ber wall, said members of the corrugated board in said flange being compressed and retained in a compressed relation by adhesive and a seam formed by stitching said flange to said solid ber wall.

3. Ina composite shipping case having certain of its 'exterior- Walls constructed from corrugated board having Aliner and corrugated members and -certainother of the exterior walls constructed of solid ber board, integral flanges of Vsolidffiber board y shipping case of this invention, the Wire stitches lmay be driven so as to be clinched either upon the surfaces of the solid flanges 9, 10 and 11, as in case of the stitches 18, or

as in the case ofthe' stitching 16, on the inner surfaces of the ends'12.

claim as new and desire` to protect by Letters Patent is:

Having described my invention 'j what I' 1. Ina composite shipping case, formed from aj plurality of blanks, at least one of said'blanks being constructed from corrul members secured together, and anotherblank 'gated board having liner and corrugated bein 'formed from solid ber board, 'margina portions on said.' corrugated blank -ormed fromV relatively solid and tough board inwhich. said members of the corrugated board arecompressed, and retained in compressed relation by adhesive and a seam {')oining said solid ber and corrugated lanks together and comprising overlapped y el portions of thepsolid fiber'blank and solid 

